Hydraulic reversing-gear.



No. 666,832. Patented Ian. 29, I901.

12.. WEBER. I HYDRAULIC REVEBSING GEAR.

(A uc tion filed Apr. 16, 1900. ([10 Model.)

lum

UNITED STATES PATENT OFFICE.

RUDOLF WEBER, OF ZURIOIL SWITZERLAND.

HYDRAULIC REVERSING-GEAR.

SPECIFICATION formingpart of Letters Patent N 0. 666,832, dated January29, 1901.

Application filed April 16,1900. Serial No. 9,097. (No model.) I

To all whom it may concern:

Be it known that I, RUDOLF WEBER, a citizen of the Republic ofSwitzerland, residing at Zurich, Switzerland, have invented certain newand useful Improvements in Hydraulic Reversing-Gear, of which thefollowing is a specification.

My invention has for its object an apparatus adapted to perform thefunction of motor-pump and reversing-gear; and this object I attain byinterposing between a driving and driven shaft pumping appliancesorganized to perform the function of power-transmitter andreversing-gear.

In the accompanying drawings, Figure 1 is a longitudinal verticalsectional view of a hydraulic reversing-gear embodying my invention; andFig. 2 is a vertical transverse section thereof, taken on line a; a; ofFig. 1.

In said figures of drawings, a indicates the driving-shaft, and g thedriven shaft, having keyed thereto a bevel-gear f. On the driving-shaftare loosely mounted the oblong casings of two pumps, Whose suction andforcing devices comprise two revoluble wheels 0 and d, havingcomparatively long intermeshing radial suction and forcing arms 0 and61, respectively, the spaces between said arms constituting thepump-buckets. The opposite faces of said wheels have a substantiallyfluidtight bearing on the inner face of their respective casings and onthe like face of the heads 19 thereof, while their arms c and d havealike bearing on the inner faces of the semicircular ends of saidcasings, wheel obeing keyed to shaft a, while wheel cl is looselymounted on a spindle h.

As shown in Fig. 2, the pump-casing bis of increased cross-sectionalarea from a transverse line intersecting the axis of wheel 0 to a likeline intersecting the axis of Wheel 01, said wheels dividing the part ofincreased cross-sectional area into suction and forcing chambers I andII, respectively.

The pump-casings b have secured to or formed on their proximate faces abevelwheel e, concentric with driving-shaft a and meshing with the likewheel f on driven shaft g, and from each of said bevel-wheels 8 projectsa rather long hub 71, abutting against each other and having formed neartheir abutting ends annular discharge-channels p,

communicating with discharge-passages 0 in said hubs, leading to theforcing chambers II of their respective casings I) through ports 2, saidports 2; and passages 0 being shown in dotted lines in Fig. 1.

On driving-shaft a are loosely mounted two discoidal heads is, one foreach pump-casing, and pressed to the heads 6 thereof by springs 8, saidheads having on their inner faces a circular passage m,in communicationwith the suction-chambers of their respective pumpcasings through ports2', (shown in dotted lines in the drawings,) and said heads carry thesuction-pipes which are in communication with the passage m.

On the abutting ends of the hubs n of the pump-casings is mounted acylindrical slidevalve 5 of such a cross-sectional area as to leave bothdischarge-channels p uncovered when said valve is in its normal positionbetween said channels. The valve is connected to one arm of a two-armedshifting-lever r, fulcrumed at q, the other arm of which lever isconnected to any suitable shifting appliance or appliances, so that whensaid valve is shifted along the hubs in one or the other direction itwill close or partially close one orthe other discharge-channel p.

The operation of the described combined pump, power-transmitter, andreversing-gear is as follows: The driving-shaft being set in motion inthe direction of the arrow thereon, Fig. 1, the suction and forcingWheel 0 will be rotated in the same direction and the like wheel d in anopposite direction, whereby a partial vacuum will be formed on thesuction side of said wheels or in the suction-chamber I, causing saidchamber to fill with water, which is then forced by both wheels 0 and 01around the semicircular portions of the easings into the forcing ordischarge chambers II, from whence it flows unobstructed through theparts 2 and passages 0 in casing-hubs n and is discharged at p. Thepumps being started and the-valve s shifted to close thedischarge-passage p of the right-hand pump, Fig. 1, for instance, thepressure of the liquid in the forcing-chamber will antagonize therotation of wheels 0 d, and as liquids are not compressible theresistance will be sufficient to act as a brake and lock said wheel 01to wheel 0 and cause said right-hand pump to revolvewith shaft a, andthrough its gear 6 and the gear f on shaft g the latter will be revolvedin the direction of the arrow thereon. Inasmuch as the gear f is alsogeared to the left-hand pump-casing, the latter will be revolved in anopposite direction, whereby the action of its pumping-wheels a disincreased in fact,.doubled-by the rotation of wheel 6 and pump-casing inopposite directions, which is equivalent to an increase in the speed ofrotation of the wheel 0 and is or may be equivalent to a speed of saidwheel twice that of the driving-shaft a, there being practically noresistance to the discharge of the liquid. Obviously, if the left-handpump-casing were caused to revolve with the driving-shaft a to driveshaft 9 the latter would rotate in a direction opposite to that of thearrow thereon.

In view of the fact that the heads have a circular passage m connectedwith their suction-pipes Zsaid passage is in perpetual communicationwith the inlet or suction port t' in the casing of the pump, and saidheads may therefore remain stationary, they being likewise looselymounted on driving-shaft a.

Having thus described myinvention, What I claim as new therein, anddesire to secure by Letters Patent, is

l. The combination with adriving and a driven shaft, rotary pumpsoperated by and mounted to revolve on said driving-shaft gearingconnecting the casings with the driven shaft; of means for locking oneor the other pump against rotation on its shaft, for the purpose setforth.

2. The combination with a driving-shaft and a driven shaft, of two pumpcasings loosely mounted on said driving-shaft gearing connecting thecasings with the driven shaft, pumping appliances operated by thedrivingshaft, and means for closing the dischargeport of eitherpump-casing, causing the liquid in the forcing-chamber to act as a brakeand lock the pump whose discharge is so closed to the driving-shaft andthereby transmit its motion to the driven shaft and cause the othervpump-casing to revolve in a direction opposite to the direction ofrotation of said driving-shaft, for the purpose set forth.

3. The combination with a driving-shaft and a driven shaft, of twopump-casings loosely mounted on said driving-shaft, gearing connectingthe casings with the driven shaft, pumping appliances operated from thedriving-shaft,adischarge-port for each pumpcasing, said ports locatedclose to each other, and a valve adapted to close one or the other portto cause the liquid in the forcing-chamber to act as a brake on thepumping appliances and therethrough lock the pn m p-casin g whosedischarge-port is closed to revolve with the driving-shaft and transmitits motion to the driven shaft, and at the same time cause the otherpump-casing to revolve in a direction opposite to the direction ofrotation of the driving-shaft, for the purpose set forth.

4. The combination with a driving-shaft and a driven shaft, of twopump-casings loose on said driving-shaft gearing on said casings fordriving the driven shaft, and pumping appliances comprising twointer-meshing bucketwheels dividing their respective casings intosuction and forcing chambers, one of said wheels fast on thedriving-shaft and the other loose on a spindle, discharge-ports incommunication with said forcing-chambers and means for closing one orthe other of said ports, whereby the liquid in the forcing-chamber whosedischarge is closed will act as a brake on the bucket-wheels andtherethrough lock the casing to the driving-shaft and transmit itsmotion to the driven shaft and cause the other pump-casing to revolve ina direction opposite to the direction of rotation of said driving-shaft,for the purpose set forth.

5. The combination with a driving-shaft of two pumps the casings ofwhich are mounted to revolve on said shaft and provided on theirproximate faces with a bevel-gear, intermeshing bucket-wheelsfor eachpump, one of said wheels secured to said driving-shaft and the otherloose on a spindle, said wheels dividing their pump-casings into suctionand forcing chambers, and said casings provided with hubs abuttingagainst each other and having an annular discharge-passage near theirends in communication with the forcing-chambers of their respectivecasings, and a cylindrical slide-valve mounted on said hubs andoperating to close the discharge-passage of one or the other pump-hub;of a driven shaft and a gear thereon geared with the pump-gears, for thepurpose set forth.

6. The combination with a driving-shaft of two pumps the casings ofwhich are mounted to revolve on said shaft and provided on theirproximate faces with a bevel-gear, inter-meshing bucket-wheels for eachpump, one of said wheels secured to said driving-shaft and the otherloose on a spindle, said wheels dividing their pump-casings into suctionand forcing chambers, and said casings provided with hubs abuttingagainst each other and having an annular discharge-passage near theirends in communication with the forcing-chambers of their respectivecasings, a cylindrical slidevalve mounted on said hubs and operating toclose the discharge-passage of one or the other pump-hub, a head 70 foreach pump-casing loose on the driving-shaft and having an annularpassageconnected withthesuction-pipe and in communication with thesuctionchamber of their respective casings and springs pressing saidheads to said casings; of a driven shaft and a gear thereon geared withthe pump-gears, for the purpose set forth.

RUDOLF WEBER.

Witnesses MORITZ VEITH, A. LIEBERKNEOHT.

